Year: 2026
Type: article
Abstract: Br perovskite composition has attracted considerable attention in recent years due to its thermal robustness, convenience for space applications as well as for all-perovskite triple junction applications as a top cell due to its wide-bandgap (1.9 eV) nature. However, homogeneous film formation, perovskite α-phase stability, poor crystallization, and solvent trapping still remain as the major challenges for this composition. Here we report a detailed analysis of solvent engineering strategy upon addition of AcN to DMSO to weaken the DMSO-rich solvation shell as supported by DLS, FTIR, GIWAXS and device data and facilitate the residual solvent removal followed by controlled crystallization resulting in better film morphology, lower surface roughness, reduced trap-assisted recombination and improvement in device parameters from 12.7% (untreated) to 14.0% (AcN-treated).
Source: Advanced Science
DOI: 10.1002/advs.77395
Language: English
Subfield: Electrical and Electronic Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $6,730
Awards: G1286236842, G1286251239, SFB 1667: Fortschrittliche Technologien für Satelliten in sehr geringer Höhe (ATLAS), G2358687476, G2618837358, G30714459, G3083819904, G3685081974, G419881185, G42916606, G4501827968, G498139845, Integriertes Handschuhkastensystem für optoelektronische DünnschichtFilme, G526230902, G650090426, G6652958823, G7095163154, G8706848947, G969889393
OpenAlex ID: W7204448024